4.4+4.4✘10+4.4✘0.2= 6.4✘1.25+1.25= 用简便方法计算。

---

0.25x1.25x0.4x8 =0.25x0.4x1.25x8（乘法交换律） =0.1x100 =10

---

4.4+4.4✘10+4.4✘0.2

=4.4×（1+10+0.2）芦亩圆
=4.4×11.2
=49.28

6.4✘耐晌1.25+1.25=
=（6.4+1）陪塌×1.25
=7.4×1.25
=9.25

---